Pull-down time from ambient to a target setpoint is application-dependent, and it is best treated as a function of your chosen NG-ISCC model, the temperature difference to the setpoint, and the specimen load you are conditioning.

The NG-ISCC-60 and NG-ISCC-80 use compressor-based refrigeration, while the NG-ISCC-100 and NG-ISCC-196 use liquid nitrogen for ultra-low setpoints. In practice, deeper setpoints and heavier loads generally require more time to cool and stabilize, even when the chamber control is already holding a steady temperature.

For consistent Charpy conditioning, “ready to test” usually means both the chamber and the specimens have stabilized. The biggest drivers are typically:

• Selected setpoint, such as -30°C down to -196°C
• Batch size and starting specimen temperature
• Heat input from door openings and transfer workflow
• Bath medium volume and circulation conditions (ethanol or another non-freezing solution)

If you want to confirm expected pull-down and soak time for your setpoint and specimen batch size, please learn more or request a quote.